1. Diphonix resin: a review of its properties and applications;Chiarizia;Separation Science and Technology,1997
2. Introduction to ion exchange and ion exchangers;Dorfner,1991
3. Dreisinger, D.B., Shaw, D.R., 1999. Ion exchange and regeneration process for separation and removal of iron (III) ions from aqueous sulfuric acid metal ion-containing solutions. United States Patent # 5,948,264.
4. Gula, M.J., Dreisinger, D.B., Horwitz, E.P., 1996. Ion exchange and regeneration process for separation and removal of iron (III) ions from aqueous sulfuric acid metal ion-containing solutions. United States Patent # 5,582,737.
5. Copper electrowinning—2003 world tankhouse operating data;Robinson,2003